ece 4180 lab 3
Dependencies: mbed wave_player mbed-rtos 4DGL-uLCD-SE SDFileSystem X_NUCLEO_53L0A1 HC_SR04_Ultrasonic_Library
part2.h@2:4845e2dae429, 2020-02-19 (annotated)
- Committer:
- emilywilson
- Date:
- Wed Feb 19 18:48:09 2020 +0000
- Revision:
- 2:4845e2dae429
led rtos
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
emilywilson | 2:4845e2dae429 | 1 | #include "mbed.h" |
emilywilson | 2:4845e2dae429 | 2 | #include "ultrasonic.h" |
emilywilson | 2:4845e2dae429 | 3 | |
emilywilson | 2:4845e2dae429 | 4 | Serial pc(USBTX, USBRX); |
emilywilson | 2:4845e2dae429 | 5 | |
emilywilson | 2:4845e2dae429 | 6 | void dist(int distance) |
emilywilson | 2:4845e2dae429 | 7 | { |
emilywilson | 2:4845e2dae429 | 8 | //put code here to execute when the distance has changed |
emilywilson | 2:4845e2dae429 | 9 | pc.printf("Distance %d mm\r\n", distance); |
emilywilson | 2:4845e2dae429 | 10 | } |
emilywilson | 2:4845e2dae429 | 11 | |
emilywilson | 2:4845e2dae429 | 12 | ultrasonic mu(p6, p7, .1, 1, &dist); //Set the trigger pin to p6 and the echo pin to p7 |
emilywilson | 2:4845e2dae429 | 13 | //have updates every .1 seconds and a timeout after 1 |
emilywilson | 2:4845e2dae429 | 14 | //second, and call dist when the distance changes |
emilywilson | 2:4845e2dae429 | 15 | |
emilywilson | 2:4845e2dae429 | 16 | int run_part2() |
emilywilson | 2:4845e2dae429 | 17 | { |
emilywilson | 2:4845e2dae429 | 18 | mu.startUpdates();//start measuring the distance |
emilywilson | 2:4845e2dae429 | 19 | while(1) |
emilywilson | 2:4845e2dae429 | 20 | { |
emilywilson | 2:4845e2dae429 | 21 | //Do something else here |
emilywilson | 2:4845e2dae429 | 22 | mu.checkDistance(); //call checkDistance() as much as possible, as this is where |
emilywilson | 2:4845e2dae429 | 23 | //the class checks if dist needs to be called. |
emilywilson | 2:4845e2dae429 | 24 | } |
emilywilson | 2:4845e2dae429 | 25 | } |
emilywilson | 2:4845e2dae429 | 26 | |
emilywilson | 2:4845e2dae429 | 27 | //Theremin style demo using HC-SR04 Sonar and a speaker |
emilywilson | 2:4845e2dae429 | 28 | // moving a hand away/towards sonar changes audio frequency |
emilywilson | 2:4845e2dae429 | 29 | |
emilywilson | 2:4845e2dae429 | 30 | DigitalOut audio(p26); //output to speaker amp or audio jack |
emilywilson | 2:4845e2dae429 | 31 | DigitalOut led(LED1); |
emilywilson | 2:4845e2dae429 | 32 | DigitalOut led2(LED2); |
emilywilson | 2:4845e2dae429 | 33 | |
emilywilson | 2:4845e2dae429 | 34 | Timeout cycle; |
emilywilson | 2:4845e2dae429 | 35 | |
emilywilson | 2:4845e2dae429 | 36 | volatile int half_cycle_time = 1; |
emilywilson | 2:4845e2dae429 | 37 | |
emilywilson | 2:4845e2dae429 | 38 | //two calls to this interrupt routine generates a square wave |
emilywilson | 2:4845e2dae429 | 39 | void toggle_interrupt() |
emilywilson | 2:4845e2dae429 | 40 | { |
emilywilson | 2:4845e2dae429 | 41 | if (half_cycle_time>22000) audio=0; //mute if nothing in range |
emilywilson | 2:4845e2dae429 | 42 | else audio = !audio; //toggle to make half a square wave |
emilywilson | 2:4845e2dae429 | 43 | led = !led; |
emilywilson | 2:4845e2dae429 | 44 | cycle.detach(); |
emilywilson | 2:4845e2dae429 | 45 | //update time for interrupt activation -change frequency of square wave |
emilywilson | 2:4845e2dae429 | 46 | cycle.attach_us(&toggle_interrupt, half_cycle_time); |
emilywilson | 2:4845e2dae429 | 47 | } |
emilywilson | 2:4845e2dae429 | 48 | void newdist(int distance) |
emilywilson | 2:4845e2dae429 | 49 | { |
emilywilson | 2:4845e2dae429 | 50 | //update frequency based on new sonar data |
emilywilson | 2:4845e2dae429 | 51 | led2 = !led2; |
emilywilson | 2:4845e2dae429 | 52 | half_cycle_time = distance<<3; |
emilywilson | 2:4845e2dae429 | 53 | } |
emilywilson | 2:4845e2dae429 | 54 | //HC-SR04 Sonar module |
emilywilson | 2:4845e2dae429 | 55 | ultrasonic mu2(p6, p7, .07, 1, &newdist); |
emilywilson | 2:4845e2dae429 | 56 | //Set the trigger pin to p6 and the echo pin to p7 |
emilywilson | 2:4845e2dae429 | 57 | //have updates every .07 seconds and a timeout after 1 |
emilywilson | 2:4845e2dae429 | 58 | //second, and call newdist when the distance changes |
emilywilson | 2:4845e2dae429 | 59 | int run_part2_EC() |
emilywilson | 2:4845e2dae429 | 60 | { |
emilywilson | 2:4845e2dae429 | 61 | audio = 0; |
emilywilson | 2:4845e2dae429 | 62 | led = 0; |
emilywilson | 2:4845e2dae429 | 63 | cycle.attach(&toggle_interrupt, half_cycle_time); |
emilywilson | 2:4845e2dae429 | 64 | mu2.startUpdates();//start measuring the distance with the sonar |
emilywilson | 2:4845e2dae429 | 65 | while(1) { |
emilywilson | 2:4845e2dae429 | 66 | //Do something else here |
emilywilson | 2:4845e2dae429 | 67 | mu2.checkDistance(); |
emilywilson | 2:4845e2dae429 | 68 | //call checkDistance() as much as possible, as this is where |
emilywilson | 2:4845e2dae429 | 69 | //the class checks if dist needs to be called. |
emilywilson | 2:4845e2dae429 | 70 | } |
emilywilson | 2:4845e2dae429 | 71 | } |